regex - SPARQL REGEX 正在运行但不显示任何内容

Question

我的 cooking 食谱本体中有两个类:

<Class rdf:about="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes">
    <equivalentClass>
        <Restriction>
            <onProperty rdf:resource="&SouthSulawesiCulinaryRecipes;NumberOfIngredientsRequired"/>
            <minQualifiedCardinality rdf:datatype="&xsd;nonNegativeInteger">1</minQualifiedCardinality>
            <onDataRange rdf:resource="&xsd;int"/>
        </Restriction>
    </equivalentClass>
    <equivalentClass>
        <Restriction>
            <onProperty rdf:resource="&SouthSulawesiCulinaryRecipes;UsesTools"/>
            <onClass rdf:resource="&SouthSulawesiCulinaryRecipes;KitchenEquipment"/>
            <minQualifiedCardinality rdf:datatype="&xsd;nonNegativeInteger">1</minQualifiedCardinality>
        </Restriction>
    </equivalentClass>
</Class> 

<Class rdf:about="&SouthSulawesiCulinaryRecipes;Place"/>

这是对象属性:

<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#HasIngredients -->

     <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeverages"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#HasRecipe -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;HasRecipe">
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;Place"/>
    <rdfs:subPropertyOf rdf:resource="&owl;topObjectProperty"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#IngR -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;IngR">
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <inverseOf rdf:resource="&SouthSulawesiCulinaryRecipes;Relation_Of"/>
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#Ing_Type -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;Ing_Type">
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;IngType"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#IngredientUsedToMake -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;IngredientUsedToMake">
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeverages"/>
    <inverseOf rdf:resource="&SouthSulawesiCulinaryRecipes;HasIngredients"/>
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#MeasurementUnit -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;MeasurementUnit">
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;CookingMeasurements"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#RecipeOrigin -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;RecipeOrigin">
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <inverseOf rdf:resource="&SouthSulawesiCulinaryRecipes;HasRecipe"/>
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;Place"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#Relation_Of -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;Relation_Of">
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;_IngR"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#ToolsUsedByRecipe -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;ToolsUsedByRecipe">
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;KitchenEquipment"/>
    <inverseOf rdf:resource="&SouthSulawesiCulinaryRecipes;UsesTools"/>
</ObjectProperty>



<!-- http://www.semanticweb.org/hp/ontologies/2014/4/SouthSulawesiCulinaryRecipes#UsesTools -->

<ObjectProperty rdf:about="&SouthSulawesiCulinaryRecipes;UsesTools">
    <rdfs:domain rdf:resource="&SouthSulawesiCulinaryRecipes;FoodAndBeveragesRecipes"/>
    <rdfs:range rdf:resource="&SouthSulawesiCulinaryRecipes;KitchenEquipment"/>
</ObjectProperty> here

首先，我有这个查询来获取本体中的所有食谱

SELECT   ?FoodAndBeveragesRecipes
   WHERE {
         ?Place :HasRecipe ?FoodAndBeveragesRecipes 
    }

结果是:

CotoMakassar

Saraba

EsPisangIjo

PalluMata

DanpoGoreng

DanpoRebus

SambalMangga

现在我正在尝试运行此查询，以便获取配方名称为“Danpo”的所有数据集(我不知道是否还有其他代码比这个更简单，如果您知道，也请告诉我):

SELECT   ?FoodAndBeveragesRecipes
   WHERE {
         ?Place :HasRecipe ?FoodAndBeveragesRecipes .
        FILTER regex (?FoodAndBeveragesRecipes ,"Danpo", "i")
    }

查询正在运行，但它是空的，我没有得到我的数据，我认为没有错误。 我想知道为什么我的过滤器无法正常工作？我应该怎么做才能获取与我的正则表达式中的关键字完全相同的数据集？ 有人可以帮助我吗？

谢谢。

Answer 1

我很确定这是 Extract triples containing particular substring using SPARQL 的重复项，我已经将其标记为这样，但在这里提供更多解释可能也会有所帮助。 hasRecipe 属性是一个对象属性。这意味着它的对象应该是个人，这意味着它们将是 IRI。 regex 函数需要一个字符串作为参数。如果您想要将正则表达式与 IRI 文本进行匹配，则需要使用 str 函数:

FILTER regex (str(?FoodAndBeveragesRecipes) ,"Danpo", "i")

也就是说，如果您只想检查它是否包含字符串，并且使用的是 SPARQL 1.1，则可以使用 contains :

filter contains(str(?FoodAndBeveragesRecipes), "Danpo")